drivers/video/mxc_ipuv3_fb.c

   1 /*
   2  * Porting to u-boot:
   3  *
   4  * (C) Copyright 2010
   5  * Stefano Babic, DENX Software Engineering, sbabic@denx.de
   6  *
   7  * IPUv3 Linux framebuffer:
   8  *
   9  * (C) Copyright 2004-2011 Freescale Semiconductor, Inc.
  10  *
  11  * SPDX-License-Identifier:     GPL-2.0+
  12  */
  13
  14 /* #define DEBUG */
  15 #include <common.h>
  16 #include <asm/errno.h>
  17 #include <asm/global_data.h>
  18 #include <linux/string.h>
  19 #include <linux/list.h>
  20 #include <linux/fb.h>
  21 #include <asm/io.h>
  22 #include <malloc.h>
  23 #include <lcd.h>
  24 #include <ipu.h>
  25 #include <video_fb.h>
  26 #include <mxcfb.h>
  27
  28 #include "ipu_regs.h"
  29 #include "videomodes.h"
  30
  31 DECLARE_GLOBAL_DATA_PTR;
  32
  33 static int mxcfb_map_video_memory(struct fb_info *fbi);
  34 static int mxcfb_unmap_video_memory(struct fb_info *fbi);
  35
  36 void lcd_initcolregs(void)
  37 {
  38 }
  39
  40 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
  41 {
  42 }
  43
  44 static void fb_videomode_to_var(struct fb_var_screeninfo *var,
  45                          const struct fb_videomode *mode)
  46 {
  47         var->xres = mode->xres;
  48         var->yres = mode->yres;
  49         var->xres_virtual = mode->xres;
  50         var->yres_virtual = mode->yres;
  51         var->xoffset = 0;
  52         var->yoffset = 0;
  53         var->pixclock = mode->pixclock;
  54         var->left_margin = mode->left_margin;
  55         var->right_margin = mode->right_margin;
  56         var->upper_margin = mode->upper_margin;
  57         var->lower_margin = mode->lower_margin;
  58         var->hsync_len = mode->hsync_len;
  59         var->vsync_len = mode->vsync_len;
  60         var->sync = mode->sync;
  61         var->vmode = mode->vmode & FB_VMODE_MASK;
  62 }
  63
  64 /*
  65  * Structure containing the MXC specific framebuffer information.
  66  */
  67 struct mxcfb_info {
  68         int blank;
  69         ipu_channel_t ipu_ch;
  70         int ipu_di;
  71         u32 ipu_di_pix_fmt;
  72         unsigned char overlay;
  73         unsigned char alpha_chan_en;
  74         dma_addr_t alpha_phy_addr0;
  75         dma_addr_t alpha_phy_addr1;
  76         void *alpha_virt_addr0;
  77         void *alpha_virt_addr1;
  78         uint32_t alpha_mem_len;
  79         uint32_t cur_ipu_buf;
  80         uint32_t cur_ipu_alpha_buf;
  81
  82         u32 pseudo_palette[16];
  83 };
  84
  85 enum {
  86         BOTH_ON,
  87         SRC_ON,
  88         TGT_ON,
  89         BOTH_OFF
  90 };
  91
  92 static unsigned long default_bpp = 16;
  93 static unsigned char g_dp_in_use;
  94 static struct fb_info *mxcfb_info[3];
  95 static int ext_clk_used;
  96
  97 static uint32_t bpp_to_pixfmt(struct fb_info *fbi)
  98 {
  99         uint32_t pixfmt = 0;
 100
 101         debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel);
 102
 103         if (fbi->var.nonstd)
 104                 return fbi->var.nonstd;
 105
 106         switch (fbi->var.bits_per_pixel) {
 107         case 24:
 108                 pixfmt = IPU_PIX_FMT_BGR24;
 109                 break;
 110         case 32:
 111                 pixfmt = IPU_PIX_FMT_BGR32;
 112                 break;
 113         case 16:
 114                 pixfmt = IPU_PIX_FMT_RGB565;
 115                 break;
 116         case 8:
 117                 pixfmt = IPU_PIX_FMT_GENERIC;
 118         }
 119         return pixfmt;
 120 }
 121
 122 /*
 123  * Set fixed framebuffer parameters based on variable settings.
 124  *
 125  * @param       info     framebuffer information pointer
 126  */
 127 static int mxcfb_set_fix(struct fb_info *info)
 128 {
 129         struct fb_fix_screeninfo *fix = &info->fix;
 130         struct fb_var_screeninfo *var = &info->var;
 131
 132         fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
 133
 134         fix->type = FB_TYPE_PACKED_PIXELS;
 135         fix->accel = FB_ACCEL_NONE;
 136         fix->visual = FB_VISUAL_TRUECOLOR;
 137         fix->xpanstep = 1;
 138         fix->ypanstep = 1;
 139
 140         return 0;
 141 }
 142
 143 static int setup_disp_channel1(struct fb_info *fbi)
 144 {
 145         ipu_channel_params_t params;
 146         struct mxcfb_info *mxc_fbi = fbi->par;
 147
 148         memset(&params, 0, sizeof(params));
 149         params.mem_dp_bg_sync.di = mxc_fbi->ipu_di;
 150
 151         debug("%s called\n", __func__);
 152         /*
 153          * Assuming interlaced means yuv output, below setting also
 154          * valid for mem_dc_sync. FG should have the same vmode as BG.
 155          */
 156         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 157                 params.mem_dp_bg_sync.interlaced = 1;
 158                 params.mem_dp_bg_sync.out_pixel_fmt =
 159                         IPU_PIX_FMT_YUV444;
 160         } else {
 161                 if (mxc_fbi->ipu_di_pix_fmt) {
 162                         params.mem_dp_bg_sync.out_pixel_fmt =
 163                                 mxc_fbi->ipu_di_pix_fmt;
 164                 } else {
 165                         params.mem_dp_bg_sync.out_pixel_fmt =
 166                                 IPU_PIX_FMT_RGB666;
 167                 }
 168         }
 169         params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi);
 170         if (mxc_fbi->alpha_chan_en)
 171                 params.mem_dp_bg_sync.alpha_chan_en = 1;
 172
 173         ipu_init_channel(mxc_fbi->ipu_ch, &params);
 174
 175         return 0;
 176 }
 177
 178 static int setup_disp_channel2(struct fb_info *fbi)
 179 {
 180         int retval = 0;
 181         struct mxcfb_info *mxc_fbi = fbi->par;
 182
 183         mxc_fbi->cur_ipu_buf = 1;
 184         if (mxc_fbi->alpha_chan_en)
 185                 mxc_fbi->cur_ipu_alpha_buf = 1;
 186
 187         fbi->var.xoffset = fbi->var.yoffset = 0;
 188
 189         debug("%s: ch: %08x xres: %d yres: %d line_length: %d mem: %08lx .. %08lx\n",
 190                 __func__,
 191                 mxc_fbi->ipu_ch,
 192                 fbi->var.xres,
 193                 fbi->var.yres,
 194                 fbi->fix.line_length,
 195                 fbi->fix.smem_start,
 196                 fbi->fix.smem_start +
 197                 (fbi->fix.line_length * fbi->var.yres) - 1);
 198
 199         retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER,
 200                                          bpp_to_pixfmt(fbi),
 201                                          fbi->var.xres, fbi->var.yres,
 202                                          fbi->fix.line_length,
 203                                          fbi->fix.smem_start +
 204                                          (fbi->fix.line_length * fbi->var.yres),
 205                                          fbi->fix.smem_start,
 206                                          0, 0);
 207         if (retval)
 208                 printf("ipu_init_channel_buffer error %d\n", retval);
 209
 210         return retval;
 211 }
 212
 213 /*
 214  * Set framebuffer parameters and change the operating mode.
 215  *
 216  * @param       info     framebuffer information pointer
 217  */
 218 static int mxcfb_set_par(struct fb_info *fbi)
 219 {
 220         int retval = 0;
 221         u32 mem_len;
 222         ipu_di_signal_cfg_t sig_cfg;
 223         struct mxcfb_info *mxc_fbi = fbi->par;
 224         uint32_t out_pixel_fmt;
 225
 226         ipu_disable_channel(mxc_fbi->ipu_ch);
 227         ipu_uninit_channel(mxc_fbi->ipu_ch);
 228         mxcfb_set_fix(fbi);
 229
 230         mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 231         if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) {
 232                 if (fbi->fix.smem_start)
 233                         mxcfb_unmap_video_memory(fbi);
 234
 235                 if (mxcfb_map_video_memory(fbi) < 0)
 236                         return -ENOMEM;
 237         }
 238
 239         setup_disp_channel1(fbi);
 240
 241         memset(&sig_cfg, 0, sizeof(sig_cfg));
 242         if (fbi->var.vmode & FB_VMODE_INTERLACED) {
 243                 sig_cfg.interlaced = 1;
 244                 out_pixel_fmt = IPU_PIX_FMT_YUV444;
 245         } else {
 246                 if (mxc_fbi->ipu_di_pix_fmt)
 247                         out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt;
 248                 else
 249                         out_pixel_fmt = IPU_PIX_FMT_RGB666;
 250         }
 251         if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */
 252                 sig_cfg.odd_field_first = 1;
 253         if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used)
 254                 sig_cfg.ext_clk = 1;
 255         if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
 256                 sig_cfg.Hsync_pol = 1;
 257         if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
 258                 sig_cfg.Vsync_pol = 1;
 259         if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL))
 260                 sig_cfg.clk_pol = 1;
 261         if (fbi->var.sync & FB_SYNC_DATA_INVERT)
 262                 sig_cfg.data_pol = 1;
 263         if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT))
 264                 sig_cfg.enable_pol = 1;
 265         if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
 266                 sig_cfg.clkidle_en = 1;
 267
 268         debug("pixclock = %lu.%03lu MHz\n",
 269                 PICOS2KHZ(fbi->var.pixclock) / 1000,
 270                 PICOS2KHZ(fbi->var.pixclock) % 1000);
 271
 272         retval = ipu_init_sync_panel(mxc_fbi->ipu_di,
 273                                 (PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
 274                                 fbi->var.xres, fbi->var.yres,
 275                                 out_pixel_fmt,
 276                                 fbi->var.left_margin,
 277                                 fbi->var.hsync_len,
 278                                 fbi->var.right_margin,
 279                                 fbi->var.upper_margin,
 280                                 fbi->var.vsync_len,
 281                                 fbi->var.lower_margin,
 282                                 0, sig_cfg);
 283         if (retval != 0) {
 284                 printf("mxc_ipuv3_fb: Error %d initializing panel\n", retval);
 285                 return retval;
 286         }
 287
 288         retval = setup_disp_channel2(fbi);
 289         if (retval)
 290                 return retval;
 291
 292         if (mxc_fbi->blank == FB_BLANK_UNBLANK)
 293                 ipu_enable_channel(mxc_fbi->ipu_ch);
 294
 295         return retval;
 296 }
 297
 298 /*
 299  * Check framebuffer variable parameters and adjust to valid values.
 300  *
 301  * @param       var      framebuffer variable parameters
 302  *
 303  * @param       info     framebuffer information pointer
 304  */
 305 static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 306 {
 307         u32 vtotal;
 308         u32 htotal;
 309
 310         if (var->xres_virtual < var->xres)
 311                 var->xres_virtual = var->xres;
 312         if (var->yres_virtual < var->yres)
 313                 var->yres_virtual = var->yres;
 314
 315         if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
 316             (var->bits_per_pixel != 16) && (var->bits_per_pixel != 8))
 317                 var->bits_per_pixel = default_bpp;
 318
 319         switch (var->bits_per_pixel) {
 320         case 8:
 321                 var->red.length = 3;
 322                 var->red.offset = 5;
 323                 var->red.msb_right = 0;
 324
 325                 var->green.length = 3;
 326                 var->green.offset = 2;
 327                 var->green.msb_right = 0;
 328
 329                 var->blue.length = 2;
 330                 var->blue.offset = 0;
 331                 var->blue.msb_right = 0;
 332
 333                 var->transp.length = 0;
 334                 var->transp.offset = 0;
 335                 var->transp.msb_right = 0;
 336                 break;
 337         case 16:
 338                 var->red.length = 5;
 339                 var->red.offset = 11;
 340                 var->red.msb_right = 0;
 341
 342                 var->green.length = 6;
 343                 var->green.offset = 5;
 344                 var->green.msb_right = 0;
 345
 346                 var->blue.length = 5;
 347                 var->blue.offset = 0;
 348                 var->blue.msb_right = 0;
 349
 350                 var->transp.length = 0;
 351                 var->transp.offset = 0;
 352                 var->transp.msb_right = 0;
 353                 break;
 354         case 24:
 355                 var->red.length = 8;
 356                 var->red.offset = 16;
 357                 var->red.msb_right = 0;
 358
 359                 var->green.length = 8;
 360                 var->green.offset = 8;
 361                 var->green.msb_right = 0;
 362
 363                 var->blue.length = 8;
 364                 var->blue.offset = 0;
 365                 var->blue.msb_right = 0;
 366
 367                 var->transp.length = 0;
 368                 var->transp.offset = 0;
 369                 var->transp.msb_right = 0;
 370                 break;
 371         case 32:
 372                 var->red.length = 8;
 373                 var->red.offset = 16;
 374                 var->red.msb_right = 0;
 375
 376                 var->green.length = 8;
 377                 var->green.offset = 8;
 378                 var->green.msb_right = 0;
 379
 380                 var->blue.length = 8;
 381                 var->blue.offset = 0;
 382                 var->blue.msb_right = 0;
 383
 384                 var->transp.length = 8;
 385                 var->transp.offset = 24;
 386                 var->transp.msb_right = 0;
 387                 break;
 388         }
 389
 390         if (var->pixclock < 1000) {
 391                 htotal = var->xres + var->right_margin + var->hsync_len +
 392                     var->left_margin;
 393                 vtotal = var->yres + var->lower_margin + var->vsync_len +
 394                     var->upper_margin;
 395                 var->pixclock = (vtotal * htotal * 6UL) / 100UL;
 396                 var->pixclock = KHZ2PICOS(var->pixclock);
 397                 printf("pixclock set for 60Hz refresh = %u ps\n",
 398                         var->pixclock);
 399         }
 400
 401         var->height = -1;
 402         var->width = -1;
 403         var->grayscale = 0;
 404
 405         return 0;
 406 }
 407
 408 static int mxcfb_map_video_memory(struct fb_info *fbi)
 409 {
 410         if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) {
 411                 fbi->fix.smem_len = fbi->var.yres_virtual *
 412                                     fbi->fix.line_length;
 413         }
 414
 415         fbi->fix.smem_len = roundup(fbi->fix.smem_len, ARCH_DMA_MINALIGN);
 416         if (gd->fb_base)
 417                 fbi->screen_base = (void *)gd->fb_base;
 418         else
 419                 fbi->screen_base = (char *)memalign(ARCH_DMA_MINALIGN,
 420                                                 fbi->fix.smem_len);
 421         if (fbi->screen_base == NULL) {
 422                 puts("Unable to allocate framebuffer memory\n");
 423                 fbi->fix.smem_len = 0;
 424                 return -EBUSY;
 425         }
 426         fbi->fix.smem_start = (unsigned long)fbi->screen_base;
 427
 428         debug("allocated fb @ paddr=0x%08X, size=%d.\n",
 429                 (uint32_t) fbi->fix.smem_start, fbi->fix.smem_len);
 430
 431         fbi->screen_size = fbi->fix.smem_len;
 432
 433         gd->fb_base = fbi->fix.smem_start;
 434
 435         return 0;
 436 }
 437
 438 static int mxcfb_unmap_video_memory(struct fb_info *fbi)
 439 {
 440         fbi->screen_base = 0;
 441         fbi->fix.smem_start = 0;
 442         fbi->fix.smem_len = 0;
 443         return 0;
 444 }
 445
 446 /*
 447  * Initializes the framebuffer information pointer. After allocating
 448  * sufficient memory for the framebuffer structure, the fields are
 449  * filled with custom information passed in from the configurable
 450  * structures.  This includes information such as bits per pixel,
 451  * color maps, screen width/height and RGBA offsets.
 452  *
 453  * @return      Framebuffer structure initialized with our information
 454  */
 455 static struct fb_info *mxcfb_init_fbinfo(void)
 456 {
 457         struct fb_info *fbi;
 458         struct mxcfb_info *mxcfbi;
 459         void *p;
 460         int size = ALIGN(sizeof(struct mxcfb_info), sizeof(long)) +
 461                 sizeof(struct fb_info);
 462
 463         debug("%s: %d %d %d\n",
 464                 __func__,
 465                 size,
 466                 sizeof(struct mxcfb_info),
 467                 sizeof(struct fb_info));
 468         /*
 469          * Allocate sufficient memory for the fb structure
 470          */
 471
 472         p = malloc(size);
 473         if (!p)
 474                 return NULL;
 475
 476         memset(p, 0, size);
 477
 478         fbi = p;
 479         fbi->par = p + ALIGN(sizeof(struct fb_info), sizeof(long));
 480
 481         mxcfbi = fbi->par;
 482         debug("Framebuffer structures at: fbi=%p mxcfbi=%p\n",
 483                 fbi, mxcfbi);
 484
 485         fbi->var.activate = FB_ACTIVATE_NOW;
 486
 487         fbi->flags = FBINFO_FLAG_DEFAULT;
 488         fbi->pseudo_palette = mxcfbi->pseudo_palette;
 489
 490         return fbi;
 491 }
 492
 493 /*
 494  * Probe routine for the framebuffer driver. It is called during the
 495  * driver binding process. The following functions are performed in
 496  * this routine: Framebuffer initialization, Memory allocation and
 497  * mapping, Framebuffer registration, IPU initialization.
 498  *
 499  * @return      Appropriate error code to the kernel common code
 500  */
 501 static int mxcfb_probe(u32 interface_pix_fmt, struct fb_videomode *mode, int di)
 502 {
 503         struct fb_info *fbi;
 504         struct mxcfb_info *mxcfbi;
 505
 506         /*
 507          * Initialize FB structures
 508          */
 509         fbi = mxcfb_init_fbinfo();
 510         if (!fbi)
 511                 return -ENOMEM;
 512
 513         mxcfbi = fbi->par;
 514
 515         if (!g_dp_in_use) {
 516                 mxcfbi->ipu_ch = MEM_BG_SYNC;
 517                 mxcfbi->blank = FB_BLANK_UNBLANK;
 518         } else {
 519                 mxcfbi->ipu_ch = MEM_DC_SYNC;
 520                 mxcfbi->blank = FB_BLANK_POWERDOWN;
 521         }
 522
 523         mxcfbi->ipu_di = di;
 524
 525         ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80);
 526         ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0);
 527         strcpy(fbi->fix.id, "DISP3 BG");
 528
 529         g_dp_in_use = 1;
 530
 531         mxcfb_info[mxcfbi->ipu_di] = fbi;
 532
 533         /* Need dummy values until real panel is configured */
 534         fbi->var.xres = panel_info.vl_col;
 535         fbi->var.yres = panel_info.vl_row;
 536
 537         mxcfbi->ipu_di_pix_fmt = interface_pix_fmt;
 538         fb_videomode_to_var(&fbi->var, mode);
 539         fbi->var.bits_per_pixel = NBITS(panel_info.vl_bpix);
 540         fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8);
 541         fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length;
 542
 543         mxcfb_check_var(&fbi->var, fbi);
 544
 545         /* Default Y virtual size is 2x panel size */
 546         fbi->var.yres_virtual = fbi->var.yres * 2;
 547
 548         mxcfb_set_fix(fbi);
 549
 550         /* allocate fb first */
 551         if (mxcfb_map_video_memory(fbi) < 0)
 552                 return -ENOMEM;
 553
 554         mxcfb_set_par(fbi);
 555
 556         lcd_line_length = (panel_info.vl_col * NBITS(panel_info.vl_bpix)) / 8;
 557
 558         debug("MXC IPUV3 configured\n"
 559                 "XRES = %d YRES = %d BitsXpixel = %d\n",
 560                 panel_info.vl_col,
 561                 panel_info.vl_row,
 562                 panel_info.vl_bpix);
 563
 564         ipu_dump_registers();
 565
 566         return 0;
 567 }
 568
 569 ulong calc_fbsize(void)
 570 {
 571         return (panel_info.vl_col * panel_info.vl_row *
 572                 NBITS(panel_info.vl_bpix)) / 8;
 573 }
 574
 575 void ipuv3_fb_shutdown(void)
 576 {
 577         int i;
 578         struct ipu_stat *stat = (struct ipu_stat *)IPU_STAT;
 579
 580         for (i = 0; i < ARRAY_SIZE(mxcfb_info); i++) {
 581                 struct fb_info *fbi = mxcfb_info[i];
 582                 if (fbi) {
 583                         struct mxcfb_info *mxc_fbi = fbi->par;
 584                         ipu_disable_channel(mxc_fbi->ipu_ch);
 585                         ipu_uninit_channel(mxc_fbi->ipu_ch);
 586                 }
 587         }
 588         clk_enable(g_ipu_clk);
 589         for (i = 0; i < ARRAY_SIZE(stat->int_stat); i++) {
 590                 __raw_writel(__raw_readl(&stat->int_stat[i]),
 591                              &stat->int_stat[i]);
 592         }
 593         clk_disable(g_ipu_clk);
 594 }
 595
 596 int ipuv3_fb_init(struct fb_videomode *mode, int di, unsigned int interface_pix_fmt,
 597                 ipu_di_clk_parent_t di_clk_parent, unsigned long di_clk_val, int bpp)
 598 {
 599         int ret;
 600
 601         default_bpp = bpp;
 602
 603         ret = ipu_probe(di, di_clk_parent, di_clk_val);
 604         if (ret) {
 605                 printf("Error initializing IPU\n");
 606                 return ret;
 607         }
 608
 609         return mxcfb_probe(interface_pix_fmt, mode, di);
 610 }